From: Jonathan Cavitt jonathan.cavitt@intel.com
[ Upstream commit 78a6ccd65fa3a7cc697810db079cc4b84dff03d5 ]
All memory traffic must be quiesced before requesting an aux invalidation on platforms that use Aux CCS.
Fixes: 972282c4cf24 ("drm/i915/gen12: Add aux table invalidate for all engines") Requires: a2a4aa0eef3b ("drm/i915: Add the gen12_needs_ccs_aux_inv helper") Signed-off-by: Jonathan Cavitt jonathan.cavitt@intel.com Signed-off-by: Andi Shyti andi.shyti@linux.intel.com Cc: stable@vger.kernel.org # v5.8+ Reviewed-by: Nirmoy Das nirmoy.das@intel.com Reviewed-by: Andrzej Hajda andrzej.hajda@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20230725001950.1014671-4-andi.... (cherry picked from commit ad8ebf12217e451cd19804b1c3e97ad56491c74a) Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c index c5b926e3f20d7..6e914c3f5019a 100644 --- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c @@ -193,7 +193,11 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode) { struct intel_engine_cs *engine = rq->engine;
- if (mode & EMIT_FLUSH) { + /* + * On Aux CCS platforms the invalidation of the Aux + * table requires quiescing memory traffic beforehand + */ + if (mode & EMIT_FLUSH || gen12_needs_ccs_aux_inv(engine)) { u32 flags = 0; u32 *cs;